Lord Fin Tube-Nickel-based brazed fin tube

What is Nickel-based brazed fin tube?

Nickel-based brazed finned tubes are a type of heat exchange component where fins, typically made of metal, are joined to tubing using nickel alloy as the brazing material. This technique is commonly employed in the manufacturing of radiators, condensers, heat exchangers, and other heat exchange equipment.

In the manufacturing process, it is essential to ensure the cleanliness of the surfaces of both the tubing and fins to ensure the quality of the brazed joint. Nickel-based alloys are typically used as the brazing material, and the fins are bonded to the tubing surface through high-temperature brazing. After brazing, necessary inspections and quality controls are conducted to ensure the strength and integrity of the joint.

Nickel-Based Brazed Finned Tube

Nickel-based brazed finned tube technology represents an advanced nickel-based brazing process derived from high-frequency welding. This innovative finned tube welding method involves a multi-step process, including acid and alkali passivation, winding, dusting, high-temperature brazing, filling, sealing, vacuuming, repassivation, and inspection.

In this process, nickel powder is melted at 950 °C, penetrating the gap between the fin and the base pipe. The result is a welded connection forming a strong alloy. Additionally, the nickel powder permeates the surface of the carbon steel, creating a dense and smooth alloy protective layer approximately 0.5 mm thick. This transformative layer imparts stainless steel-like performance to ordinary carbon steel.

Tin-Brazed Copper Finned Tube:

This type of finned tube involves the firm welding of copper tube and copper sheet, achieving a 100% welding rate. Not only does this eliminate contact thermal resistance, but it also enhances heat transfer significantly. Moreover, these tubes can endure prolonged use under high-temperature conditions.

Brazed Finned Tube Application:

Primarily employed in the heat exchange components of vacuum furnace heat exchangers, these tubes offer reliable performance and efficiency in demanding thermal applications.

Copper Tube Copper Plate Phosphor Bronze Brazed Finned Tube:

Featuring a 100% tube sheet welding rate and negligible contact thermal resistance, this type of finned tube boasts small fin wrinkles, uniform sheet spacing, and can operate at temperatures exceeding 600 °C. It excels in high-temperature environments, ensuring long-term stability even under elevated tube wall temperatures.

Nickel-Valent Brazed Finned Tubes:

Utilizing an advanced welding process, these tubes join the base pipe to the finned tube by melting nickel-chromium alloy solder under high temperatures and a reducing atmosphere. The fins are brazed to the base pipe through a meticulous process involving winding, dusting with nickel-chromium alloy powder, and high-temperature sintering. Nickel-based brazed finned tubes find extensive applications in industries such as petroleum, chemical, natural gas, metallurgy, electric power, and carbon, showcasing their versatility and reliability. This technology plays a crucial role in various fields, providing efficient and durable solutions for heat exchange applications across diverse industries.

Tin-Brazed Copper Finned Tube